Contents
How is STD calculated in zonal statistics table?
RANGE — Calculates the difference between the largest and smallest value of all cells in the value raster that belong to the same zone as the output cell. STD — Calculates the standard deviation of all cells in the value raster that belong to the same zone as the output cell.
How does zonal statistics work in Spatial Analyst?
For majority and minority calculations, when there is a tie, the output for the zone is based on the lowest of the tied values. The data type of the output is dependent on the zonal calculation being performed and the input value raster type. See how Zonal Statistics works for more information.
How to calculate the sum of zonal statistics?
Consider, for example, a zone that is 2,500 rows and columns of cells in size, and the value of each cell is 1,000. The sum for that zone would be 2,500 x 2,500 x 1,000 = 6.25 billion. If an integer output is required and the range is within ± 2.147 billion, you can apply the Int tool.
What is the middle value in zonal statistics?
If there are n cells in the zone and n is odd, the middle (n/2) value is written to each cell in the zone. If there is an even number of cells, the (n/2) -1 value is output. The lowest value in each zone is assigned to all cells in that zone.
How is nodata calculated in zonal statistics table?
NODATA — Within any particular zone, if any NoData cells exist in the Value raster, it is deemed that there is insufficient information to perform statistical calculations for all the cells in that zone; therefore, the entire zone will receive the NoData value on the output raster. Statistic type to be calculated.
How is a zone defined in zonal statistics?
Summarizes the values of a raster within the zones of another dataset and reports the results to a table. A zone is defined as all areas in the input that have the same value. The areas do not have to be contiguous. Both raster and feature can be used for the zone input.
How does zonal statistics work in ArcGIS help?
The data type for each value under the items in the output table is dependent on the zonal calculation being performed. See how Zonal Statistics works for the specific behavior of any statistic. The number of rows in the output table is the number of zones. By default, this tool will take advantage of multi-core processors.
How is zone data used in zonal statistics?
The input zone layer defines the shape, values, and locations of the zones. An integer field in the zone input is specified to define the zones. A string field can also be used. Both raster and feature datasets can be used as the zone dataset. The input value raster contains the input values used in calculating the output statistic for each zone.